Cerberus caught on fire "Noooooo not again grahhhhhhh." the fire was engulfing him Serana ran up and casted a spell on him.

"With this sealing spell you will be in service of this kid here." She pulled off one of Cerberus claws and magically floated it over to Ignis. "With this we will be able to claim the reward and now his spirit is in your service whenever you need him you can summon him."